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Lift pump alternatives

After some considerable digging thru the cryptic Delphi website I was able to access their 2005 feed pump catalog online. (Yep, 2005 seems to be the latest version available). The spec for the hpf923 which is the pump that the hpf953 replaces were 50gph @ 10psi, with "psi shut off" at 18. The hpf953 is supposedly "improved", so one could assume (perhaps dangerously)that the specs are at least the same, or a bit better than the 923 pump.

Comparing that to the frb 5, it seems as if it might be a decent fit.

If I do a setup like Turbine Doc's, and leave the airtex in line the issue of flow on fail may not be such a worry, as the airtex could still get me home if the hpf failed.

Anybody see flaws in my logic?
 
great white said:
So, you power both the stock LP and the walbro simultaneously?

I got the impression from some of your other posts you turn one off and one on...

The pic you provided is good enough friend. I can see it's literally just "T-d" in on both suction and pressure sides.

But feel free to toss up a few more if you want!

;)
Click to expand...


I can choose to run one, other, or both, glad the 1 pic did it for you, it's raining today so no pics :D

Normally I run the Walbro solo, each lift has it's own independent relay source, with a toggle switch to break the "control leg" of the relay fed by the OPS/PCM sidethat would have powered the GM lift, currently it is "functional" but not attractive. ):h
 
Yachtcare said:
Comparing that to the frb 5, it seems as if it might be a decent fit.

If I do a setup like Turbine Doc's, and leave the airtex in line the issue of flow on fail may not be such a worry, as the airtex could still get me home if the hpf failed.

Anybody see flaws in my logic?
Click to expand...

That is what I was indicating with my earlier post if one wanted to run the old style vane Cummins pump, in parallel with OEM style. My Walbro cost $40 so a no brainer, Cummins pump I have was free, I've got plans for it to be my in bed transfer tank pump (another unfinished project) for another day.
 
I don't really like the performance of the walbro especially at 130 bux. After prefilter and post filter the IP sees 5ish idle, and drops to 2-3 under normal heavy load.

Unless filters are spankin new, thats what I get anyhow. 10micron Racor prefilter, and the flt-mgr.

I had a 2nd walbro so I plumbed them inline, one before the racor with the built in screen, and one after the racor without the screen, the PRE is switcheable with a toggle.

I would NEVER spend the money for 2 walbros, Doing it again, I dont' think I'd buy the one.

Interesting link of my setup, and how it came to be.

http://www.thetruckstop.us/forum/showthread.php?t=22139
I really like the 2, but there has to be WAY better options for 260 bux.

I am a firm believer that my truck runs better with 7-8 PSI under highway load than with 2-3psi.

It absolutely gets more fuel to pedal position.
 
Matt Bachand said:
I don't really like the performance of the walbro especially at 130 bux. After prefilter and post filter the IP sees 5ish idle, and drops to 2-3 under normal heavy load.

Unless filters are spankin new, thats what I get anyhow. 10micron Racor prefilter, and the flt-mgr.

I had a 2nd walbro so I plumbed them inline, one before the racor with the built in screen, and one after the racor without the screen, the PRE is switcheable with a toggle.

I would NEVER spend the money for 2 walbros, Doing it again, I dont' think I'd buy the one.

Interesting link of my setup, and how it came to be.

http://www.thetruckstop.us/forum/showthread.php?t=22139
I really like the 2, but there has to be WAY better options for 260 bux.

I am a firm believer that my truck runs better with 7-8 PSI under highway load than with 2-3psi.

It absolutely gets more fuel to pedal position.
Click to expand...

Matt yours like Kenny's overheat that gave him fits has some odd thing going on that is truck specific, my IP supply Walbro only, maintains 6-7 psi highway 2-3 on WOT, 10-12 @ idle.

Matt your sig says dual tank, does all your fuel come through the selector valve, is it possible it is not fully stroking over, or you have a blockage in it you don't know about ? that is one thing not in my set up vs yours, possibly a reason for the disparity over expected results with single walbro.
 
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Matt Bachand said:
I don't really like the performance of the walbro especially at 130 bux. After prefilter and post filter the IP sees 5ish idle, and drops to 2-3 under normal heavy load.

Unless filters are spankin new, thats what I get anyhow. 10micron Racor prefilter, and the flt-mgr.

I had a 2nd walbro so I plumbed them inline, one before the racor with the built in screen, and one after the racor without the screen, the PRE is switcheable with a toggle.

I would NEVER spend the money for 2 walbros, Doing it again, I dont' think I'd buy the one.

Interesting link of my setup, and how it came to be.

http://www.thetruckstop.us/forum/showthread.php?t=22139
I really like the 2, but there has to be WAY better options for 260 bux.

I am a firm believer that my truck runs better with 7-8 PSI under highway load than with 2-3psi.

It absolutely gets more fuel to pedal position.
Click to expand...

260$ for two LPs that are still not giving you any substanial FP is a huge waste of money IMHO. I only paid 250$ for the Raptor on my CUCV and it has a lifetime warranty. And you can bet I don't have supply problems...:thumbsup:

As soon as the LP on the Dually give even a hint of trouble, A raptor is going on except I'll spend the 400$ for the whole kit with wiring and relays. Not to mention it sounds REALLY COOL !!

I agree with Tim. The filtration of the Air dog/Fass is nice I guess but for the extra 200$ not worth it for me.
 
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Well, thanks to the scumbags at Lee's Auto ranch in Ellington CT, I bought it directly from Pureflow because those a'holes at Lee's told me the one I had was bad when in fact it was thier sh@tty wiring job so I had to buy the second one. That was the LP alone though at that price. No Install Kit or mounting. I didn't need any of that for my CUCV anyway.

Cumminalong is a Pureflow dealer, He could probably get a price on Just a LP, no kit.

The nice thing about the Kit though is it comes with the wiring harness and relays to plug into existing wiring and eliminates the strain off the OPS.

That was of no use to me on the CUCV. They don't make a kit. A Raptor is wayy overkill and ridicoulous for a 6.2NA but it was layin there on the bench and the truck needed a LP....:D

Plus did I mention is sounds really cool ? :D
 
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Acesneights1 said:
Plus did I mention is sounds really cool ? :D
Click to expand...

No Kenny you never ONCE mentioned that when I was there, more than once but never once :D

Raptor may be fine and what is needed, but for me it is too loud, and from long time going to sea, putting all eggs 1 basket not best for me, I like ability of a redundant independent back up where it is possible and makes sense.

2 Walbros IMO are not needed it is the path that was chosen & worked for Matt, if I was in Matt's scenario I would have looked further to see why my single Walbro was not pulling the load, and plumbed in as I did the GM as back up in parallel.

GM designed his truck to operate with a single 28 GPH pump, as far as I can tell Matt does not hot rod his truck, so in that conservative driving style 17 more gph from the Walbro should be sufficient in upping the ante over what GM provided, as it is working in vehicles driven far more aggressively or pulling bigger weights.


My GM pump pulling my gn loaded to 18K was capable of 2-3 psi cruise speed IP feed with momentary dips to .5 on hard WOT accel, Stanadyne says 1-2 is all that is required to keep the IP happy and dips to .5 ok if lift able to recover as soon as WOT demand settled back to cruise 2-3 psi feed pressures.

If Matt was dropping to less than that then there is another issue now masked by in series Walbros making life better for him, but requires now having two pumps running full time to be there.

Something just is not adding up, here.
 
Yeah and his LP fungus has infected my Burb....:rofl:
I have had alot of fuel delivery problems with various trucks I have in the last year or so and my experience(and a buddy named Ynot from the garage) has taught me the best thing to do is sight glass it if you suspect air or run the truck off a 5 gal can of fuel thus eliminating the tank/pickup. My advice to you Matt would be to disconnect your fuel line from the influent side of the LP and run a hose to 5 gal can of diesel and test. I saved myself 2,000$ for an IP on a 3208T listening to that advice to find I had a PS bottle floating around in my tank.:eek:
 
I agree with Matt, $130 is to much for a Walbro FRB5. They won't be getting many orders for them anymore I bet. Its a good pump, but not $130 worth.
Also agree with TD that Matt should not need 2 pumps in line. I just put a pre LP filter and Walbro LP on my 94. It maintains 6-7 psi for all my normal driving. Filter is a 30 micron. No tank sock.
 
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